DataSheet.jp

IR3891 の電気的特性と機能

IR3891のメーカーはInternational Rectifierです、この部品の機能は「Highly Integrated SupIRBuck」です。


製品の詳細 ( Datasheet PDF )

部品番号 IR3891
部品説明 Highly Integrated SupIRBuck
メーカ International Rectifier
ロゴ International Rectifier ロゴ 




このページの下部にプレビューとIR3891ダウンロード(pdfファイル)リンクがあります。

Total 30 pages

No Preview Available !

IR3891 Datasheet, IR3891 PDF,ピン配置, 機能
Dual output, 4A/Phase, Highly Integrated SupIRBuckTM
Single-Input Voltage, Synchronous Buck Regulator
IR3891
FEATURES
Single 5V to 21V application
Wide Input Voltage Range from 1V to 21V with
external Vcc
Output Voltage Range: 0.5V to 0.86*PVin
Dual output, 4A/Phase
Enhanced Line/Load Regulation with Feed-
Forward
Programmable Switching Frequency up to 1.5MHz
Internal Digital Soft-Start
Enable input with Voltage Monitoring Capability
Thermally compensated current limit and Hiccup
Mode Over Current Protection
External synchronization with Smooth Clocking
Precision Reference Voltage (0.5V +/-1%)
Seq pin for Sequencing Applications
Integrated MOSFETs, drivers and Bootstrap diode
Thermal Shut Down
Open Feedback Line Protection
Over Voltage Protection
Interleaved Phases to reduce Input Capacitors
Monotonic Start-Up
Operating Junction Temp: -40oC<Tj<125oC
Small Size 5mm x 6mm PQFN
Lead-free, Halogen-free, and RoHS Compliant
DESCRIPTION
The IR3891 SupIRBuckTM is an easy-to-use, fully
integrated and highly efficient DC/DC regulator. The
onboard PWM controller and MOSFETs make IR3891
a space-efficient solution, providing accurate power
delivery for low output voltage.
IR3891 is a versatile regulator which offers
programmability of switching frequency and a fixed
current limit while operating in wide input and output
voltage range.
The switching frequency is programmable from
300kHz to 1.5MHz for an optimum solution.
It also features important protection functions, such as
Over Voltage Protection (OVP), Pre-Bias startup,
hiccup current limit and thermal shutdown to give
required system level security in the event of fault
conditions.
APPLICATIONS
Sever Applications
Netcom Applications
Set Top Box Applications
Storage Applications
Embedded telecom Systems
Distributed Point of Load Power Architectures
Computing Peripheral Voltage regulators
General DC-DC Converters
ORDERING INFORMATION
Base Part
Number
IR3891
IR3891
Package Type
PQFN 5mm x 6mm
PQFN 5mm x 6mm
Standard Pack
Form
Quantity
Tape and Reel
750
Tape and Reel
4000
Orderable Part
Number
IR3891MTR1PBF
IR3891MTRPBF
1 www.irf.com © 2013 International Rectifier
May 08, 2013
Free Datasheet http://www.datasheet4u.com/

1 Page





IR3891 pdf, ピン配列
Dual output, 4A/Phase, Highly Integrated SupIRBuckTM
Single-Input Voltage, Synchronous Buck Regulator
IR3891
FUNCTIONAL BLOCK DIAGRAM
Vin VCC/LDO_out
- LDO
+
VCC
UVLO
UVLO
VLDO_REF
+
-
Gnd
Comp
Seq*
fb
VREF
-
+
Intl_SS
+++ E/A
-
FAULT
POR
EN UVEN
UVLO
SOFT
START
Vin Rff
SSOK
UVEN
POR
VREF
POR
THERMAL TSD
SHUTDOWN
OV/OFLP
POR
OC
FAULT
CONTROL
FAULT
FB HDin
FAULT
LDin
CONTROL
LOGIC
OC
GATE
DRIVE
LOGIC
VCC
OVER CURRENT
PROTECTION
VREF
FB
UV/ UV/
OV/OLFP OV/OLFP
HDrv
LDrv
Boot
PVin
SW
PGnd
Vsns Rt/Sync PGood
*The Seq pin is only available for channel 2
Figure 3: IR3891 Simplified Block Diagram (one phase)
3 www.irf.com © 2013 International Rectifier
May 08, 2013
Free Datasheet http://www.datasheet4u.com/


3Pages


IR3891 電子部品, 半導体
Dual output, 4A/Phase, Highly Integrated SupIRBuckTM
Single-Input Voltage, Synchronous Buck Regulator
IR3891
ELECTRICAL SPECIFICATIONS
RECOMMENDED OPERATING CONDITIONS
SYMBOL
DEFINITION
MIN
PVin
Input Bus Voltage *
1.0
Vin Supply Voltage
5.0
VCC
Supply Voltage **
4.5
Boot to SW
Supply Voltage
4.5
VO Output Voltage
IO Output Current
Fs Switching Frequency
0.5
0
300
TJ Junction Temperature
-40
* SW1/2 node must not exceed 25V
** When VCC is connected to an externally regulated supply, also connect Vin.
MAX
21
21
7.5
7.5
0.86 * PVin
4
1500
125
UNIT
V
A / Phase
kHz
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over, 6.8V < Vin=PVin < 21V in 0°C < TJ < 125°C.
Typical values are specified at Ta = 25°C.
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
Power Stage
Power Losses
Top Switch
Bottom Switch
Bootstrap Diode
Forward Voltage
SW Leakage Current
Dead Band Time
Supply Current
VIN Supply Current
(standby)
VIN Supply Current
(dynamic)
PLOSS
Rds(on)_Top
Rds(on)_Bot
ISW
Tdb
Iin(Standby)
Iin(Dyn)
Vin = 12V, Vout1 = 1.8V,
Vout2 = 1.2V, IO =
4A/phase, Fs = 600kHz,
L1 =2.2uH, L2=1.5uH,
Note 4
VBoot - Vsw= 5.3V, IO =
4A, Tj = 25°C
Vcc = 5.3V, IO = 4A, Tj =
25°C
I(Boot) = 10mA
1.38 W
27.5 36.4
19.5 24.2
300 450
m
mV
SW = 0V, Enable = 0V
SW = 0V, Enable = high,
VSeq = 0V
Note 4
10
1
2
20 30
µA
µA
ns
EN = Low, No Switching
EN = High, Fs = 600kHz,
100 175
12.0 17
µA
mA
VCC LDO Output
Output Voltage
VCC Dropout
Vcc
Vcc_drop
Vin(min) = 6.8V, Io = 0-
60mA, Cload = 2.2uF
5
5.3 5.6
V
Icc = 60mA, Cload =
2.2uF
0.75 V
6 www.irf.com © 2013 International Rectifier
May 08, 2013
Free Datasheet http://www.datasheet4u.com/

6 Page



ページ 合計 : 30 ページ
 
PDF
ダウンロード
[ IR3891 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
IR3891

Highly Integrated SupIRBuck

International Rectifier
International Rectifier
IR3892

Highly Integrated SupIRBuck

International Rectifier
International Rectifier
IR3894

12A HIGHLY INTERGRATED SUPLRBUCK

International Rectifier
International Rectifier
IR3895

16A HIGHLY INTERGRATED SUPLRBUCK

International Rectifier
International Rectifier


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap